Effect of Yb additions on microstructures and properties of 7A60 aluminum alloy

Fang, Huajing; Chen, Kanghua; Zhang, Zhuo; Zhu, Changjun

doi:10.1016/s1003-6326(08)60006-0

Cited by 52 publications

(26 citation statements)

References 7 publications

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“…The requirement was to go to high strength tough alloys. Working at high temperature properties implies good stress corrosion cracking resistance [1][2][3][4][5] . In order to achieve this goal, microalloying with transition or rare earth elements such as Ni, Co, Sc, Zr, Yb, Cr and Er 1,[6][7][8][9] is an effective method in attaining this objective.…”

Section: Introductionmentioning

confidence: 99%

The Role of cobalt and nickel intermetallic phases on the mechanical properties and microstructure evolution of Al-Zn-Mg-Cu alloys

2014

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In this study, the effects of cobalt and nickel additions on microstructure evolution and mechanical properties of Al-Zn-Mg-Cu alloys produced by chill casting process were investigated. Al-Zn-MgCu aluminum alloys containing Ni and Co additives were homogenized at different heat treatment conditions, aged at 120°C for 24 h, and retrogressed at 180°C for 30 min then re-aged at 120°C for 24h.Comparison of the ultimate tensile strength of the Al-Zn-Mg-Cu base alloy underwent RRA temper process with that of the base alloy underwent a similar heat treatment process after the addition of 0.5 wt. % Ni and 0.5 wt. % Co showed that the gains of tensile strengths of the orders of 100 MPa and 135 MPa were attained respectively. These improvements are attributed to phase dispersion particles of the formation of Ni and Co-rich such as and Co intermetallic dispersoids retarded the grain growth, led to grain refinement and precipitation hardening and resulted in further strengthening of the Al alloy. Microstructure characterization of the alloys was carried out using optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD).

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Section: Introductionmentioning

confidence: 99%

The Role of cobalt and nickel intermetallic phases on the mechanical properties and microstructure evolution of Al-Zn-Mg-Cu alloys

2014

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“…Aluminum and its alloys are very important material because of their wide use in many industries. They are used in the aviation, aerospace and automotive industries, in the production of military hardware, in ship building and household appliances [2][3][4]. Their usefulness is derived from their very good mechanical and physical properties such as their weight-to-high strength ratio, good machining properties, recyclability, and their outstanding corrosion resistance.…”

Section: Aluminum Alloymentioning

confidence: 99%

“…Popoola et al [37] confirm that in aggressive environment, the protective film on the surface of aluminum usually breakdown leading to initiation and further propagation of pits. The authors studied the corrosion inhibition of aluminum alloy in 2 M HCl and HNO 3 with Arachis hypogaea natural oil as an inhibitor using potentiodynamic polarization and gravimetric techniques at 25°C. The obtained results showed that Arachis hypogaea oil in 2 M HCl and HNO 3 -solutions decreased the corrosion rate of aluminum alloy at different concentrations of inhibitor considered.…”

Section: Corrosion Prevention Of Aluminum Alloymentioning

confidence: 99%

Gluconates as Corrosion Inhibitor of Aluminum in Various Corrosive Media

Omotayo¹,

Popoola²

2017

Aluminium Alloys - Recent Trends in Processing, Characterization, Mechanical Behavior and Applications

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Corrosion processes are responsible for huge losses in industry. Though organic, inorganic and mixed material inhibitors were used for a long time to combat corrosion, the environmental toxicity of organic corrosion inhibitors has prompted the search for inorganic corrosion inhibitors. The effect of gluconates as novel corrosion inhibitors on the corrosion of aluminum alloy in acidic and saline media was investigated by electrochemical and weight loss techniques. The effect of inhibitor concentration was also investigated. High resolution scanning electron microscopy equipped with energy dispersive spectroscopy (HR-SEM/EDS) was used to characterize the surface morphology of the metal before and after corrosion. Experimental results revealed that gluconates in the studied solution decreased the corrosion rate at the different concentrations studied. The experimental results obtained from potentiodynamic polarization method showed that the presence of the gluconates in 3.5% NaCl and 0.5 M H 2 SO 4 solutions decreases the corrosion current densities (icorr) and corrosion rates (CR), and increases the polarization resistance (Rp). It was observed that the inhibitor efficiency depends on the corrosive media, concentration of the inhibitor and the substrate material. The adsorption characteristics of the gluconates were also described. Good correlation exists between the results obtained from both methods.

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“…Furthermore, a morphological evolution of precipitates or secondary phases is achieved by adding appropriate amount of Yb [19][20][21] . Consequently, alloys with Yb modification exhibit enhanced performances in terms of mechanical properties 11,15,19 , corrosion resistance 13,18,22 , and thermal stability 10,21 compared with the unmodified counterparts.…”

mentioning

confidence: 99%

“…Recent studies focused mostly on microstructure and mechanical properties under the aged and deformed Ybcontaining alloys 15,19,20,22 . However, few reports are available concerning the homogenization treatment on Mg-Zn-Yb alloys.…”

mentioning

confidence: 99%

Microstructure Evolution of the Mg-5.8 Zn-0.5 Zr-1.0 Yb Alloy During Homogenization

Jiang

Guo

et al. 2017

Mat. Res.

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The influence of homogenization treatment on microstructure evolution of Mg-5.8Zn-0.5Zr-1.0Yb (mass fraction, %) alloy was investigated under different annealing temperatures and holding times. Results indicated a severe dendritic segregation in the as-cast ingot. Zn and Yb segregate remarkably at the grain boundary and Zr appears in the form of precipitates. The Mg-Zn binary eutectic phases and a new ternary phase Mg-Zn-Yb are mainly distributed at dendrite boundaries. After homogenization, most of the eutectic phases dissolve into the matrix, except for a small amount of Mg-Zn-Yb phase. The area fractions of residual secondary phase decrease from 5.54% in the as-cast alloy to 0.59% in the well-homogenized sample. Microhardness test indicates that with the increasing temperature and holding time, microhardness value decreased sharply within the first stage of homogenization and then increased steadily to the local maximum value at 380 ºC and 12 h, followed by a slight reduction. Basing on the comprehensive analysis on microstructure and mechanical properties, the homogenization treatment at 380 ºC for 12 h is preferable.

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Effect of Yb additions on microstructures and properties of 7A60 aluminum alloy

Cited by 52 publications

References 7 publications

The Role of cobalt and nickel intermetallic phases on the mechanical properties and microstructure evolution of Al-Zn-Mg-Cu alloys

The Role of cobalt and nickel intermetallic phases on the mechanical properties and microstructure evolution of Al-Zn-Mg-Cu alloys

Gluconates as Corrosion Inhibitor of Aluminum in Various Corrosive Media

Microstructure Evolution of the Mg-5.8 Zn-0.5 Zr-1.0 Yb Alloy During Homogenization

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